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Author Topic:   SPORT 13 Engine Weight, Horsepower
msethsmile posted 05-22-2014 03:48 PM ET (US)   Profile for msethsmile   Send Email to msethsmile  
Is [the 175-lbs weight or the 50-HP of a 1972 Mercury 500 outboard engine] too much weight or power [for the transom of a] 1968 SPORT 13?
jimh posted 05-22-2014 05:04 PM ET (US)     Profile for jimh  Send Email to jimh     
The rated maximum power is 40-HP, so 50-HP exceeds the maximum rating. There was no rating for maximum transom weight, so it is hard to say if 175-lbs will be too much.
dg22 posted 05-22-2014 06:02 PM ET (US)     Profile for dg22  Send Email to dg22     
The transom on my 1967 13 footer has held up with my 1973 50-HP Evinrude on it. My motor weighs around 185 lbs. I've used it now for 5 summers and pull the kids skiing and tubing and no problems so far -- touch wood. No additional stress cracks since I purchased the boat about 6 years ago.

This is how it sits in the water with the 50hp on it.

I think the ideal motor for this boat is the older 35hp Evinrude or Johnson from the 70's and early 80's which only weighs around 120 lbs.

Note: People re-powering with newer 30hp motors weigh around 160 to 170 lbs so you are not too far off with your Merc 500.

jimh posted 05-23-2014 12:29 AM ET (US)     Profile for jimh  Send Email to jimh     
dg22--Re your digital image: nice boat, cute kid, wet dog, cool boat house.
dg22 posted 05-23-2014 09:51 AM ET (US)     Profile for dg22  Send Email to dg22     
Thanks Jim, that was the day we launched the boat for first time after fixing it up. My father-in-law thought I was nuts fixing up this old boat but it turned out nice. CW is a great resource for information.
msethsmile posted 05-27-2014 11:22 AM ET (US)     Profile for msethsmile  Send Email to msethsmile     
The 13 must not have too maany hours on it. No stress cracks in the transom. Original rub rail, steering system, gel, etc. I suspect the 500 has been on there since 1972. I have a 86 Rude 20 and agree that series (20-25-30-35) would be dandy on a 13. Unforetunately, that motor is a 20 inch and on a pontoon.
dg22 posted 05-27-2014 01:52 PM ET (US)     Profile for dg22  Send Email to dg22     
I would just make sure everything is in good working order, particularly the old steering system. I replaced the wire rope with my original steering.

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